What is the answer to Let Sn=1-2+3-4+...+(-1)n-1 n then S47+S33+S100 equals?
I need an explanation on how to do it also.
For Sn the n should be in the bottom
N-1 should be at the top
In S47 the 47 should be in the bottom In S53 the 53 should be at the bottom. And for S100 the 100 should be in the bottom.